Keyence GV21P Digital CMOS Laser Sensor Head

World's First Datum Algorithm
Stable Detection of Metal Targets
Stable Detection of Black Targets (Rubber)
Ultra-Long Range up to 1m (39.37")
Tough, Rugged: IP-67 Enclosure Rating    
Black Out 1
White Out 2
Pink External Input
Violet Laser Control
Brown 10-30V DC
Blue OV